The CMMG AR-15 MK4 Receiver Extension Kit is a testament to precision engineering and robust design, crafted to enhance your firearm's performance. This mil-spec 6-position adjustable buffer tube is made from durable aluminum with a matte black hard coat anodized finish, ensuring longevity and reliability. Ideal for range time and training, this extension kit seamlessly integrates with AR-15 platforms, offering flexibility and ease of use. CMMG is renowned for its innovative firearm solutions, making this kit a trusted choice for enthusiasts.

Key Features:
- Manufacturer: CMMG
- Model: AR-15 MK4
- Product Type: Buffer Tube
- Material: Aluminum
- Finish: Matte Black
- Unique Features: 6-position adjustable, Mil-Spec
- What's In The Box: Carbine Buffer Tube, Receiver End Plate, Castle Nut, Action Spring, Buffer